Based on engineering examples and understanding the slope and rail transit conditions,geological conditions,and geotechnical parameters of foundation pits,this article proposes the difficulties and common design problems in the design of ultra deep foundation pit support.Based on the requirements of construction safety and quality reliability,solutions are discussed,and a comprehensive support scheme of"double row piles in the shape of a gate+rotary jet sealing curtain between piles"is proposed to evaluate the impact on the safety of existing track structures,Verify the feasibility of the support scheme for exceeding the limit deep foundation pit based on deformation monitoring results.Practice has shown that the ultra deep foundation pit support scheme adopted in this project is feasible and can achieve good support effects,such as ensuring the safety of rail transit operation,protecting the ecological environment,and improving on-site construction conditions.
overlimit deep foundation pitrail transitsupportdouble row pileswater stop curtain
NETL
NSTL
维普
万方数据
